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Ruggedness

How hilly a generated map's ground is, as a figure from 0 to 100.

Specification
Applies to
random map generation
File
map seed file
Section
[RandomMap]
Value
integer
When omitted
UnchangedThe read passes the current setting through, and the generator's settings outlive one map, so an omitted assignment keeps whatever the last map built in this session left behind.

The hills are laid down by a walk across the map that gives each cell a height drawn from the neighbors already settled, which is what makes the ground roll rather than step. The figure sets both how far each step of that walk may move — a tenth of a level plus a thousandth per point — and how widely the walk is allowed to wander around it. Cells beside a shoreline or a cliff face are pinned first and keep the height they were given, so the walk cannot raise a hill into the sea or bury an existing cliff. Map seed files covers the section it is written in.

map seed file
[RandomMap]
Ruggedness=40

The walk is skipped entirely unless the figure is at least 2, so 0 and 1 both leave the ground exactly as the region pass left it. This is separate from the cliffs: RegionSize governs the sharp height changes between regions, and this figure the gentle relief laid over them afterward.